Rulers disappear when changing modes

I just used the rulers from the measurement tools because I wanted to sketch out a squirrel in Grease Pencil, and then model it.

I just noticed that the ruler disappears after I change to Grease Pencil mode.

Is it possible to get some kind of toggle for the rulers, maybe in Overlay (as that’s where annotations could be found, which is just next to the Measure feature)?